Improvement in nails and tacks



UNITED STATES PATENT OFFICE.A

RACHEL SPEER, OF PASSAIO, NEW JERSEY.

I MPROVEMENT IN NAILS AND TACKS.

Specification forming part of Letters Patent No. 56,114, dated July 3, 1866.

Toall 'whom it may concern:

Be it known that I, RACHEL SPEER, of Passaic, in the county of Passaic and State of New Jersey, have invented a new and useful Improvement in Nails and Tacks; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the ac. companying drawings, forming part of this secured to each other by driving the fasteningA through them.

The invention embraces all kinds and sizes of nails and bolts and tacks, each of which is made to perform its office by being driven to its place. Such i'astenin gs are sometimes Very liable to work loose, and in the case ot' the soles ot' such boots and shoes as are held together by tacks, it is very common for the work soon to rip by reason of the drying and shrinking of the leather, or because the tacks or nails work loose in the strain put on the work in wearing it. This improvement prevents the seams from ripping by means of the peculiar form given to the nail or tack, which is made with a double taperthat is to say, with two successive conical bodies, the point of one being joined tothe base of the other.

My invention is applicable to all kinds of nails and tacks and bolts that are made use of by driving; but I have in this example only shown it applied to tacks or nails for shoes.

The letter A designates the improved tack -or nail. lt is made with a shoulder, B, at

about the center of its length, from which the end tapers ott' to a point after the manner of a cone, the length of this part and the diameter of the shoulder being determined on by having regard to the whole length of the tack or nail.

The upper part, O, of the tack or nail is of like shape with its end, saving that its vertex or point is removed, so that it forms a frustum of areone whose top is united to the base of the conical end already described. The part G is greater in diameter at its head than the diameter of the shoulder B, and it may have a flanged head, like common tacks, if desired.

Nails or tacks made in this way when driven into the sole or bottom ot' a shoe will become locked by the closing of the leatherI behind the shoulder B, thereby preventing its return and insuring the seam or joint from ripping loose, while the conical shape of the part G prevents the nail or tack from going farther into the leather. Being locked or heldin this manner, it will retain its proper position until the part C is entirely worn away, at which.

time only will the shoulder B become exposed and be liable to work out ot' place.

The said nails or tacks can be made by casting or bv pressure between dies, as in making nails in nail-machines. 4l have here shown `them conical in both divisions; but they can be made iiat, with two successive seriesv of bevcls on the opposite sides, or with one division conical and the other a ilattened cone.

The same principle can be applied to wooden pegs. 4

I claim as new and desire to secure by Letters Patentl Making nails and tacks with bodies formed of double cones, or having conical outlines on opposite sides thereof', substantially as l described.

RAGHEL SPEER. Witnesses:

WM. F. MONAMAEA, ALEX. F. ROBERTS. 

